AND TM-2440, Instruction Manual

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The following examples are general causes of malfunction and
countermeasures.
Use of mobile phones
Radio waves may cause unexpected malfunctions.
Wireless communication devices, home networking
devices such as walkie-talkies mobile phones, cordless
phones and these types of communication devices can
affect the recorder. Therefore, they are necessary to
keep a minimum distance of
33
m or more from the
recorder.
If there is static electricity in the usage environment (discharges
from devices or the surrounding area)
Before using the recorder, ensure that the operator and
patient have discharged static electricity.
Humidify the room.
9. Environmental Protection
Before disposing of the recorder, remove the lithium battery from
the recorder.